1.When your girl is a pro freak and can cum and cum at the slightest instance of being horny
2. When you tell her to cum she can
3. She Knows how to control her orgasm4. When a girl can cum/orgasm mutiple times

Me:My girl is definetly a busta babe everytime i fuck her she cums at least five times!
Busta babe:yes! yes! i just busted all over your dick with my warm fluids!Me:Last night i fucked my girl and she busted all over my shirt!